linux-kernel - [RFC PATCH 05/11] mm/damon/lru_sort: consider age for quota prioritization

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Message-Id: <20250628165144.55528-6-sj@kernel.org>
Date: Sat, 28 Jun 2025 09:51:38 -0700
From: SeongJae Park <sj@...nel.org>
To: 
Cc: SeongJae Park <sj@...nel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	damon@...ts.linux.dev,
	kernel-team@...a.com,
	linux-kernel@...r.kernel.org,
	linux-mm@...ck.org
Subject: [RFC PATCH 05/11] mm/damon/lru_sort: consider age for quota prioritization

DAMON_LRU_SORT is doing under-quota access pattern based regions
prioritization using only access frequency.  Age of regions is another
useful information for distinguishing hot and cold regions.  Use it for
the prioritization, too.

Signed-off-by: SeongJae Park <sj@...nel.org>
---
 mm/damon/lru_sort.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/damon/lru_sort.c b/mm/damon/lru_sort.c
index 4af8fd4a390b..7513ebc6aeef 100644
--- a/mm/damon/lru_sort.c
+++ b/mm/damon/lru_sort.c
@@ -71,7 +71,7 @@ static struct damos_quota damon_lru_sort_quota = {
 	/* Within the quota, mark hotter regions accessed first. */
 	.weight_sz = 0,
 	.weight_nr_accesses = 1,
-	.weight_age = 0,
+	.weight_age = 1,
 };
 DEFINE_DAMON_MODULES_DAMOS_TIME_QUOTA(damon_lru_sort_quota);
 
-- 
2.39.5